With reference to Example 13.5, test the null hypothesis σ1 – σ2 = 0 against the alternative hypothesis σ1 – σ2 > 0 at the 0.05 level of significance.
Answer to relevant QuestionsWith reference to Exercise 13.40, test at the 0.10 level of significance whether it is reasonable to assume that the two populations sampled have equal variances. In Exercise To find out whether the inhabitants of two South ...A doctor claims that less than 30 percent of all per-sons exposed to a certain amount of radiation will feel any ill effects. If, in a random sample, only 1 of 19 per-sons exposed to such radiation felt any ill effects, test ...In a random sample of 600 cars making a right turn at a certain intersection, 157 pulled into the wrong lane. Use the 0.05 level of significance to test the null hypothesis that the actual proportion of drivers who make this ...If 26 of 200 tires of brand A failed to last 30,000 miles, whereas the corresponding figures for 200 tires of brands B, C, and D were 23, 15, and 32, test the null hypothesis that there is no difference in the durability of ...It is desired to test whether the number of gamma rays emitted per second by a certain radioactive sub-stance is a random variable having the Poisson distribution with λ = 2.4. Use the following data obtained for 300 ...
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